Furnace.



No. 778,328. PATENTED OCT. 25, 1904,

E. LANE.

FURNAGE.

APPLIOATION `FILED FEB. 6, 1904. N0 IIIODBL. 4 SHEETS-SHEET 1.

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FURNAGE.

APPLICATION FILED Pmm, 1904.-

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No. 773,328. v PATENTED OCT. 25, 1904. E. LANE.

FURNACB.

APPLICATION FILED FEB.6, 1904.

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No. 773,328. PATBNTED OCT. 25, 1904.

` E. LANE.

PURNAGE.

APPLICATION FILED Pme, 1904.

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PATENT OFFICE.

EDWARD LANE, OF KANSAS CITY, MISSOURI.

FURNACE SPECIFICATION forming part of Letters Patent No. 773,328, dated October 25, 1904.

Application *filed February 6, 1904. Serial No. 192,461. (No model.)

T0 @ZZ whom/ t party concern:

Be it known that I, EDWARD LANE, acitizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

My invention relates to furnaces; and my object is to produce a furnace which will consume the combustible g'ases which ordinarily escape and in such action also consume practically all the smoke which arises.

IVith this and other objects in view, as hereinafter appear, the invention consists in certain novel and peculiar' features of construction and organization, as hereinafter described and claimed, and in order that it may be fully understood reference is to be had to the accompanying' drawings, in which-- Figure 1 is a top plan view of a furnace embodying my invention. Fig. 2 is a section Fig. 3 is a section on the line III III of Fig. 2. Fig. 4 isa section on the line IV IV of Fig'. 3. Fig. 5 is a section on the lineV V of Fig. 3. Fig. 6 is a section on the line VI VI of Fig. 2. Fig. 7 is an elevation showing the means for securing the coal-regulating door at the desiredposition of adjustment. Fig'. 8 isadetail edge view of the grate-door and also shows, broken away, the contiguous portion of the grate and the turn-button for locking the grate-door closed. Fig. 9 is a section on line IX IX of Fig. 2.

In the said drawings, where like reference characters designate corresponding parts, 1 designates the front portion, 2 the rear porion, 3 thel end portion, 4 the boiler portion, and the smoke-stack portion, of the furnace.

The front portion of the furnace at a suitable height has its frontwall set back, as at 6, the step or jog thus formed in the front wall providing an opening 7 and anv opening 8. Parallel grooved bars 9, secured in the furnace-wall, one on the top of opening 7 and the other at the back of opening 8, carry a slide-plate 10 and in conjunction with said A plate keep opening 7 always closed, the slideplate considerably exceeding the width of the front portion of the furnace,forapurpose hereinafterexplained. Said slide-plate is provided with acentral slot 11 and at oppositesides of said slot with forwardly-projecting apertured lugs 12, wherein are pivoted the trunnions 13 of a sleeve 14, said sleeve carrying slidingly a rod 15,V provided at its inner end with a head 16, which normally rests in the groove 17 in one of Vthe side walls of the furnace, this groove preventing any accidental movement of the push-rod, as it is hereinafter termed, because it is utilized to push the coal into the furnace in case it should not feed automatically with the required regularity. By the construction described it will be obvious that the rod can be pivotally operated in a vertical plane and at the same time reciprocate with the slide-plate 10, and it will also be noticed, by reference particularly to Figs. \1, 3, and 6, that by sliding plate 10 the push-rod is pushed laterally across the furnace, so as to give access to the entire body of fuel. Because of this, thesli'de-plate is of sufcient length to keep the opening 7 bridged irrespective of the position of the push-rod.

The lower grooved bar for plate 1() also forms the front support for the grate-section 19, the grate-bars of which are pitched downwardly and rearwardly and slightly diverge in order to correspond with the divergence of the side walls of the front portion -of the furnace, this divergence showing clearly in Figs. 1 and 3 and being' for the purpose of providing increased space to accommodate thc expansion of the gases as the heat increases, said continuously-expanding chamber therefore facilitating the progress of the gases and smoke.

2O isa grate-section, preferably pitched downward and rearward at a greater angle than section 19, the grate-bars of section 2O running transversely and also sloping slightly downward tothe left. Said grate-section is provided' at its lower rear corner with an opening 21, normally closed by a door-sectiontated down into the ash-pit 24 of the front portion of the furnace.

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Rearward of grate section 2O and also pitched downward and rearward is a third grate-section 25, .said grate-section having its rear end resting on the partition-wall 26, scparating the front from the back portion of the furnace. The front portion of section Q5 is higher than the rear portion of section 2O and is provided with a depending portion 27, attached to the lower rear edg'e of section 2O and forming a shoulder at the rear of said section, which will arrest elinkers and ashes to prevent them from passing' on section 25V through thearched opening 28 of wall 26.

To give access t0 the ash pit, the front opening 29 is closed by doors 39, of the usual or any preferred type, and occupying the ashpit chamber and extending approximately parallel with and below grate-section 19 is a slidable partition-plate 31, said partitioirplate being mounted, by preference, in grooved cleats 32, secured to the inner wall of the furnace, the side edges of said plate being substantially parallel, so that it can be slidforward through the slot 33 in the front wall when it is desirable to obtain access to gratesections 19 and 2O from below.

The sliding partition has a stop 34 at its front end to limit rearward movement and a handle 35 for convenience of operation. The slide-plate terminates short of the grate-door 22, so as not to interfere with the opening and closing of the latter, and is designed to ferm an air-passage to direct the cold air entering opening 8 against the bottom of the grate.

In the upper front portion of the combustion-chamber 36 is a fuel-hopper 37, controlled' by a door 38. At the top of the furnace and below said Vhopper is a swinging door 39 to regulate or altogether cheek, if desirable, the passage of fuel from the hopper onto the grate-section 19. This swinging door 39 has a crank-handle 40 projecting through one wall of the furnace, and said handle is provided with a ratchet-wheel 41, adapted to be secured against accidental movement by the pivoted dog 42.

Rearward of the hopper the back wall of the furnace is provided with an opening' 43, controlled by a hinged door 44, said opening being provided chiefly to enable the attendant to inspect the interior of the furnace.

ln the rear portion of the furnace, which runs transversely of the front portion and which provides for expansion by having its walls diverge in the direction of the stack portion, as shown clearly in Fig. 3, is a grate 45, which grate is adapted to receive incandescent fuel through the arched opening 28, said grate-section being also pitched downwardly toward the stack portion. Access to the ash-pit chamber 46 of said auxiliary furnace, as it is in fact, is obtained through the opening' 47, normally closed by door 48, said ash-pit chamber being' bridged from its higher end to the doorway by partition 49, which partition forms the betteln of the substan tially semicircular flue 50, connecting the front furnace with the rear furnace. The point of communication with the front furnace, as shown clearly, is opposite the depressed side of grate-section 20, and at such point of connection an inclined wall 5l forms a shoulder or abutment to prevent the fuel en terilig said flue.

Access to the combustion-chamber of the rear furnace for sight purposes primarily is through the triangular opening 52, controlled by door 53. Flue 50, like the furnace-chambers, expands continuously from its receiving to its delivery end, and at the last-named end its back wall is increased in thickness to form a deflector 54, said defiector being for the purpose of causing the smoke and gases passing through the flue and entering the rear furnace-chamber to be deflected forwardly over that portion of the grate contiguous to the arched opening, where the lire is hottest and where it will be almost entirely consumed.

At the opposite or lower end of the grate 45 risesthe abutment or wall 55, which serves to hold the incandescent fuel upon said grate until it is entirely consumed, and at the lower end said grate is provided with a door 56, through which clinkers may be removed, though in practice it has been found that the heat is so intense in the auxiliary furnace that clinkers do not form.

The delivery end of the combustion-Chaim ber 57 of the rear or auxiliary furnace opens into the boiler-chamber 4, the boiler 58 beicng supported in the usual or any preferred manner and having a central flue 59, which extends from its receiving to its delivery end and at the latter communicates with the smokestack portion 5, in which the lower end of the smoke-stack 60 is secured. Said smoke-stack, like the boiler, expands toward its delivery end.

Extending through a side wall of the furnace and into the magazine is a Y-shaped pipe 6l, the fork of the pipe being about half the capacity of its body and provided with a valve 62, by which either fork can be completely closed or so adjusted that air may pass through both forks simultaneously into the magazine, one of the forks being adapted to receive cool air and the other hot air from pipe 63, which extends through the iiue 50 and communicates with the external air at the rear of the furnace, said air being heated in its passage through the flue, and said pipe 63 is pitched upwardly and forwardly, by preference, to faeilitate circulation. The air entering the magazine is for the purpose of conveyingthe smoke and gases which are generated therein out through the short discharge-pipe 64, said pipe beingdisposed, by preference, at the opposite end of the magazine from pipe 6l and pitched downwardly and rearwardly, so as to IOO IIO

above the arch and communicates with flue' 50, hot air being delivered into the furnace in the plane of said flue by the pipes 66, which extend along by the boiler and through the stack portion 5, so that the air passing through said pipes shall be heated by the impingement on the pipes of the gases passing up into the stack, which, in connection with a furnace of the type described, is preferably of short length. To mix with the hot air thus delivered into the furnace, so as to form a combustible gas which will act to effect the complete consumption of the smoke, superheated steam is conducted from the boiler, through a pipe 67, to the furnace, the discharge end of the pipe being' contiguous to the corresponding ends of pipes 66. Pipe 67 is connected with the steam-pipe 68 and has a valve 69 to regulate the amount of steam passing through pipe 67 or to entirely cut off -such supply of steam, if desirable. To supply additional air to the furnace, which willtend to disseminate the smoke over the hottest portion of the fire and to mix therewith and with the gases to more reliably insure the burning` thereof, I provide one or more pipes 70, these pipes heating thc air, because they extend through flue 50 for more or less distance. Furthermore,they are pitched upwardly and inwardly, y

depth the height of the arch, so as to practii cally close the arch passage to anything but incandescent fuel, a percentage of the latter falling or being pushed by push rod l5 through said passage onto the auxiliary furnace-grate 45. The magazine is k'ept charged with fuel at all times and the door 39 adjusted to regulate the feed therefrom to the grate below. Then desired, said valve can be used to entirely cut ofi' the passage of such fuel. Should the fuel stick, as it usually does, more or less, the operator manipulates the pushrod 15, in the manner hereinbefore explained, to dislodge such fuel and push it down upon the grate-sections 20 and 25. A fierce fire and thorough combustion is supported in the furnace, because of thelarge supply of oxygen entering at so many different points, the main draft passing down through opening-8 and up through the grate. The supplemental draft through the magazine 6 discharges smoke formed therein down onto the fire.

.The supplemental draft through pipes 70 tends to disseminate or spread such smoke, so as to check its movement and give the fire a better opportunity to consume it and the gases mixed with it. The pipes 66 and 67 ,not only act to force such suspended smoke close down upon the incandescent fuel, but also produce a combustible gas by the mixture of superheated steam and air, which adds to the intensity of the fire, and thus acts to effect the complete and thorough combustion of the smoke and gases. rlhe comparatively small volume of smoke and gases which escape through iiue 50 enter the rear furnace-chamber and are consumed by the incandescent fuel of the auxiliary grate, it being understood that the fire on this grate is practically smokeless, for the reason that nothing but incandescent fuel passes through the arch opening.y

By virtue of the constantly-expanding front furnace, flue, and rear furnace room is provided for the constantly-'expanding mixture of air, gas, and smoke in order that thc force of the draft shall not be lessened by friction with a relatively contracted passage-way. It will thus be seen that the constantly-expanding passage-way by accommodating the expansion of the products of combustion creates a forced draft through the furnace to produce a fierce fire and that the means employed for forcing the smoke and gases into intimate relation with the front furnace, together with the cooperation of the auxiliary furnace, results in a substantially thorough consumption of the smoke and gases, the heated non-combustible gases passing from the last-named .furnace through the constantly expanding passage of the boiler and the smoke-stack, which stack need therefore project but a comparatively short distance above the boiler.

The clinkers can be removed from the furnace bysimply projecting a poker up through the topmost section of the front grate and forcing them down onto the second grate-section and then projecting' the end of the poker up through said section and forcing the clinkers down to the opening 21, through which they fall when the door 22 is opened intothe ash-pit below.

To remove the clinkers from the auxiliaryfurnace grate, the poker is introduced through the opening 44 and the` clinkers forced down to the opening of the grate controlled by door 56, which can be opened or closed by the proper manipulation of the poker, as will be readily understood.

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From the above description it will be apparent that .l have produced a furnace embodying the features of advantage enumerated as desirable in the statement of the object of the invention and which may obviously be modified in various particulars without departing from the spirit and scope or sacrilicing any of the advantages of the invention.

Having thus described the invention, what l claim as new, and desire to secure by Letters Patent, is

1. A furnace, having a front chamber and a rear chamber, an opening connecting said chambers, and a flue also connecting said chambers, said flue at its front end communicating with the side of the front chamber, a grate in the front chamber comprising a front portion, a rear portion registering` with the opening and provided with a shoulder 27 at its front end, and a middle portion extending from the front portion to the rear portion, and pitched downwardly toward the latter so that its rear end occupies a lower plane than the front end of the rear portion.

2. A furnace, havinga front portion, a rear portion, an opening connecting said portions, a fine opening through the side of the front portion and communicating at its opposite end with the rear portion, and a channel or groove in the inner side of the wall of the front portion and communicating at its delivery end with ,the front end of said fiue, and a grate for the front portion, said grate registering at its rear end with said opening'.

3. A furnace, having a front portion, and a rear portion, an opening connecting' said portions, and a fiue also connecting said portions, said fiue opening at its front end into the side of the front portion, and a grate for the front portion, said grate comprising a front portion, arear portion, and a middle portion, said middle portion sloping' downwardly toward the wall through which said liuc opens, and a door-controlled opening in the lower end of said sloping' middle portion of the grate.

4. A furnace, having a front portion, a rear portion, an opening connecting the front portion and rear portion, and a flue also connecting said portions and opening at its front end through the side of the front portion, and a grate for the front portion, said grate comprising a front portion having its bars extending longitudinally and pitched downwardly and rearwardly, a rear portion registering with the said opening and also pitched downwardly and rearwardly and provided with a depending portion at its front end, and a middle portion extending downwardly from the rear end of the front portion to the lower end of the depending part of the rear portion of the grate to produce a shoulder at the front end of the latter; said middle portion having its grate-bars extending transversely and terminating` at a point below the plane of the lower side of the front end of said flue, and

havingadoor-controllcd opening' in its lower end.

A furnace comprising a front portion provided with a grate, a rear portion, a wall having an arched opening separating said portions, and a flue connected to the rear portion and communicating with the front portion at one side of and above the grate.

6. A furnace comprising a front portion provided with a grate, a rear portion, a wall having an arched opening separating said portions, and a flue connected to the rear portion and communicating with the front portion at one side of and above the grate, and having a shoulder contiguous to the grate to prevent the fuel entering the flue.

7. A furnace, comprising a front portion provided with a grate, a rear portion, a wall having' an arched opening separating said portions, a flue connected to the rear portion and communicating with the front portion at one side of and above the grate and having' a shoulder contiguous to the grate to preventthe fuel entering the flue, and a valve-controlled pipe extending upwardly and inwardly through the flue, and terminating about in the plane of the mouth of the latter.

8. A furnace, comprising a front portion provided with a grate, a rear portion, a wall having an arched opening separating said portions, a flue connected to the rear portion and communicating with the front portion at one side of and above the grate and having a shoulder contiguous to the grate to prevent the fuel entering the fiue, a pipe extending upwardly and inwardly through the iiue and terminating about in the plane of the mouth of the latter, and a slide plate or valve controlling the opposite end of said pipe to exclude air passing therethrough into the furnace when desired.

9. A furnace, comprising a front portion provided with a grate and having its combustion -chamber increasing in crosssectional area toward its rear end, a rear portion, awall having an arched opening separating said portions, and a flue connected to the rear portion and communicating with the front portion at one side of and above the grate; said Hue' increasing in cross-sectional area from its front toward its rear end.

l0. A furnace, comprising a front portion provided with a grate and having its combustion-chamber increasing in cross sectional area toward its rear end, a rear portion having a grate and also having its combustionchamber of increasing cross-sectional area from the front toward the rear end of the grate, a wall separating said portions, and having an arched opening' above said grates, and a flue communicating with the front combustion-chamber at one side, and with the rear combustion-chamber at its front end; said flue increasing in cross-sectional area from its point of communication with the front com- IOO bustion-charnber to its point of communication with the other combustion-chamber.

11. A furnace, comprising a Jfront portion provided with a grate and having its combustion-chamber increasing in cross-sectional area toward its rear end, a rear portion having a grate and also having its combustionchamber of increasing cross-sectional area from the front toward the rear end of the grate, a wall separating said portions, and having an arched opening above said grates, a iue communicating with the front combustion-chamber at one side, and with the rear combustion at its frontend; said flue increasing in cross-sectional area from its point of communication with the front combustionchamber to its point of communication with the other combustion-chamber, and an upwardly-flaring stack having its lower end communicating with the delivery end of the second combustion-chamber.

12. A furnace, comprising a front portion provided witha grate and having its combustion-chamber increasing in cross-sectional area toward its rear end, a rear portion having'a grate and also having its combustionchamber of increasing cross-sectional area from the front toward the rear end of the grate, a wall separating said portions, and having an arched opening above saidgrates, a iue communicating with the front combustion-chamber at one side, and with the rear combustion-chamber at its frontend; said Hue increasing' in cross-sectional area from its point of communication with the front combustion-chamber, to its point'of communication with the other combustion-chamber, an upwardly-Haring stack having its lower end communicating with the delivery end of thev second combustion-chamber, and a boiler interposed between the second combustionchamber and the stack and having' its liuc of increasing cross-sectional area, from its front or receiving to its rear or delivery end.

13. A furnace, comprising a front portion provided with a grate and having its combustion-chamber increasing in cross-sectional area toward its rear end, a rear portion having a grate and also having its combustion-chamber second combustion-chamber and the stack and having its flue of increasing cross-sectional area from its front or receiving to its rear or delivery end, and a wall or shoulder' between the rear end of the grate of the second combustion-chamber and the front end of the boiler-flue. l

14. A furnace, comprising a front portion provided with a grate having its combustionchamber increasing in cross sectional area toward its rear end,a rear portion having a grate and also having its combustion-chamber or' increasing cross-sectional area from the front toward the rear end of the grate, a wall separating said portions, and having an arched opening above said grates, a flue communicating with the front combustion-chamber at one side of the same, and at its rear end with the front end of thc rear combustion-chamber; said Hue increasingin cross-sectional area from its point of communication with the front combustion-chamber to its point of communication with the other combustion-chamber, an upwardly Haring stack having its 'lower end communicating with the delivery end of the second combustion chamber, a boiler interposed between the second combustion-chamber and the stack and having its flue of increasing cross-sectional area from its front or receiving to its rear or delivery end, a wall or shoulder between the rear end of the grate of the second combustion-chamber and the rear end of the boiler-flue, and a doorcontrolled opening in the rear end or' the grate of the second'combustion-chamber.

15. A furnace comprising a front portion having a grate, -a rear portion havinga grate extending transversely of the front grate and occupying a lower plane than the same, an opening connecting the front and rear portions above said grates, a flue opening into the side of the front portion, and into the front end or' the rear portion, and a deiiectingwall at the front end of the rear portion above its grate. v

16. A furnace comprising a front portion having a grate, a rear portion having a grate extending transversely of the front grate and occupying a lower plane than the same, an opening connecting the front and rear portions above said grates, a iue opening into the side or' the front portion, and into the front end of the rear portion, a deiiecting-wall at the front end of the rear portion above its grate, door controlled openings for said grates, and doors controlling communication with the ash-pit chambers below said grates.

In testimony whereof I afliX my signature in the presence of two` witnesses.

EDWARD LANE. Witnesses H. C. RoDGERs, G. Y. THORPE.

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